Move QuotaPermissionContext to content/public/browser and put it in the content namespace.

chrome/browser/chrome_content_browser_client.h

Index: chrome/browser/chrome_content_browser_client.h
diff --git a/chrome/browser/chrome_content_browser_client.h b/chrome/browser/chrome_content_browser_client.h
index e1d4d84ece31f137017bfc7d3e584042574321b4..432df96e0ee0f51c4d7c7b86acfbcd1debc9306e 100644
--- a/chrome/browser/chrome_content_browser_client.h
+++ b/chrome/browser/chrome_content_browser_client.h
@@ -12,6 +12,10 @@
 #include "base/compiler_specific.h"
 #include "content/public/browser/content_browser_client.h"
 
+namespace content {
+class QuotaPermissionContext;
+}
+
 namespace chrome {
 
 class ChromeContentBrowserClient : public content::ContentBrowserClient {
@@ -80,7 +84,8 @@ class ChromeContentBrowserClient : public content::ContentBrowserClient {
       const std::vector<std::pair<int, int> >& render_views) OVERRIDE;
   virtual net::URLRequestContext* OverrideRequestContextForURL(
       const GURL& url, content::ResourceContext* context) OVERRIDE;
-  virtual QuotaPermissionContext* CreateQuotaPermissionContext() OVERRIDE;
+  virtual content::QuotaPermissionContext*
+      CreateQuotaPermissionContext() OVERRIDE;
   virtual void OpenItem(const FilePath& path) OVERRIDE;
   virtual void ShowItemInFolder(const FilePath& path) OVERRIDE;
   virtual void AllowCertificateError(